Wall surface anti-condensation and wall body backpressure waterproof simulation laboratory and test method

Abstract

The invention provides a wall surface anti-condensation and wall body backpressure waterproof simulation laboratory. The simulation laboratory comprises a large test room, a small test room, cold water supply equipment and hot water supply equipment, a first air conditioner is arranged in the large test room, and a second air conditioner and a humidifier are arranged in the small test room; the small test room is enclosed by a plurality of concrete test walls, a water circulation pipeline and an overflow pipeline are embedded in each concrete test wall, liquid inlet and outlet ports of the water circulation pipelines are respectively communicated with a liquid supply port of the cold water supply equipment and a liquid supply port of the hot water supply equipment through a tee joint, and a plurality of small water outlet holes are formed in the pipe wall of the overflow pipeline; a pressurizing water injection device capable of adjusting water pressure is arranged on each concrete test wall, and a water outlet of the pressurizing water injection device is communicated with a water inlet of the overflow pipeline; the invention further provides a wall surface anti-condensation and wall body backpressure waterproof simulation test method. The wall surface anti-condensation and wall body backpressure waterproof simulation laboratory and the test method have the advantages that the detection cost can be reduced, and the detection period can be shortened, so that material development can be better assisted.

Description

Technical Field

[0001] This invention relates to the field of coating performance testing, specifically to a simulated laboratory and test method for preventing condensation on walls and waterproofing under back pressure. Background Technology

[0002] During the period from July to October in northern regions, the high temperatures and humidity cause condensation to form on cooler walls. When a significant amount of condensation forms, it can run down the walls, creating visible water on the floor. Furthermore, basements in high-end villas, public buildings, and commercial buildings typically use concrete walls as a framework, surrounded by soil after construction. During rainy days, this soil becomes soaked, and if the external water pressure exceeds the basement walls' impermeability, rainwater seeps into the basement. Both condensation and water seepage cause significant problems for basements, leading to issues such as mold growth and damage to interior finishes.

[0003] To address the problems caused by condensation and water seepage on walls, the applicant is developing a specialized coating to prevent condensation and a back-pressure waterproofing material for walls. Developing these two materials requires extensive testing by technical personnel. Although there are national standard testing methods for both condensation prevention and back-pressure waterproofing, the testing conditions for both materials are quite stringent. Data analysis must be conducted under standard conditions, requiring specialized equipment. The applicant can only send these materials to professional testing institutions for testing, which is both expensive and time-consuming, taking nearly two months to produce results, thus impacting the product development schedule.

[0004] In order to solve the above problems, people have been seeking an ideal technological solution. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a simulated laboratory and testing method for wall anti-condensation and wall back pressure waterproofing that can reduce testing costs and shorten testing cycles, thereby better assisting in the development of materials.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a simulated laboratory for wall anti-condensation and wall back pressure waterproofing, comprising a large test chamber, a small test chamber located inside the large test chamber, and cold water supply equipment and hot water supply equipment located outside the large test chamber; a first air conditioner is installed in the large test chamber, and a second air conditioner and a humidifier are installed in the small test chamber; the small test chamber is enclosed by multiple concrete test walls, each of which is embedded with a water circulation pipe and an overflow pipe, the inlet and outlet ports of the water circulation pipe are respectively connected to the supply port of the cold water supply equipment and the supply port of the hot water supply equipment via a tee, and the overflow pipe has several small outlet holes on its wall; each of the concrete test walls is equipped with a pressure injection device capable of adjusting water pressure, and the outlet of the pressure injection device is connected to the inlet of the overflow pipe.

[0007] Based on the above, the water circulation pipeline is located close to the inner wall of the concrete test wall, and the overflow pipeline is located close to the outer wall of the concrete test wall.

[0008] Based on the above, the overflow pipeline includes a horizontal main pipe and several vertical branch pipes. The inlet of the overflow pipeline is located in the center of the horizontal main pipe. The top ends of several vertical branch pipes are connected at equal intervals to the bottom of the horizontal main pipe. Several outlet holes are located on the pipe wall of each of the vertical branch pipes.

[0009] Based on the above, the pressurized water injection device includes a pressurized pump and a water storage tank. The inlet of the water storage tank is connected to the liquid supply port of the cold water supply equipment through a pipe, and the pressurized pump is installed at the outlet of the water storage tank.

[0010] Based on the above, a circulation pump is installed on the water circulation pipeline, and valves are installed on the liquid supply ports of the cold water supply equipment and the hot water supply equipment.

[0011] This invention also provides a method for simulating wall condensation prevention and wall back pressure waterproofing, which uses the wall condensation prevention and wall back pressure waterproofing simulation laboratory as described above, and includes the following steps: Step 1: Applying materials: Apply different backwater and pressure-resistant materials to the inner walls of each concrete test wall, and then apply different coatings to the surface of each backwater and pressure-resistant material; Step 2: Simulate a damp basement environment: Turn on the first air conditioner and set the temperature in the large test chamber to t1; turn on the second air conditioner and set the temperature in the small test chamber to t2; turn on the humidifier and set the humidity in the small test chamber to s; connect the water circulation pipeline to the cold water supply equipment to keep the concrete test wall at a low temperature. Step 3: Conduct a wall anti-condensation test: Gradually increase the humidity s in the small test chamber, observe and record the condensation of the paint on each concrete test wall; Step 4: Simulate a basement water seepage environment: Each of the pressurized water injection devices injects water into each of the concrete test walls through the overflow pipe, and the initial water injection pressure is set to p. Step 5: Conduct a back pressure waterproofing test: Gradually increase the water injection pressure p of each of the pressurized water injection devices, observe and record the water seepage pressure of the back water pressure-resistant material on each of the concrete test walls; Step 6: Remove the water-resistant and pressure-resistant material and paint applied to each of the concrete test walls for use in the next test.

[0012] Based on the above, step six includes the following sub-steps: Step S1: The water circulation pipeline is connected to the cold water supply equipment to cool the wall. Step S2: The water circulation pipeline is connected to the hot water supply equipment to heat the wall; Step S3: Repeat steps S1 and S2 multiple times. During this process, the pressurized water injection device is used to intermittently replenish water into the concrete test wall, causing the wall to alternate between thermal expansion, contraction, dampness, and dryness. Step S4: Remove the backwater and pressure-resistant material and paint applied to each of the concrete test walls, connect the water circulation pipeline to the hot water supply equipment, and dry the wall.

[0013] This invention has outstanding substantive features and significant progress compared to the prior art. Specifically, this invention has the following advantages: (1) The temperature in the large test room is set by the first air conditioner, the temperature in the small test room is set by the second air conditioner, the humidity in the small test room is set by the humidifier, and the cold water supply equipment is connected by the water circulation pipeline. Through the circulation of cold water, the temperature of the concrete test wall can be reduced, thereby simulating the environmental conditions of a basement with humid air and cold walls. Different coatings are applied to the inner wall of the small test room. By gradually adjusting the humidity in the small test room, the anti-condensation performance of different coatings can be tested and compared.

[0014] The pressurized water injection device can inject water into the concrete test wall through the overflow pipe and can adjust the water pressure to simulate the environmental conditions of water seepage in the basement wall. It can test and compare the back pressure waterproofing performance of different back pressure waterproofing materials.

[0015] (2) The water circulation pipeline connects the cold water supply equipment and the hot water supply equipment, and can switch between cold and hot water. When the wall is cooled, an anti-condensation test can be carried out, and when the wall is heated, the water evaporation can be accelerated. Especially when peeling off the back water pressure protection material and the coating, by alternately switching between cold and hot water and the pressurized water injection device intermittently replenishing water into the concrete test wall, the wall can alternate between thermal expansion, cold contraction, dampness and dryness. Since the physical properties of the wall and the material are different, the alternating changes in state will quickly reduce the adhesion between the two, thereby making the material easier to peel off.

[0016] (3) The water circulation pipeline is close to the inner wall of the concrete test wall and closer to the coating material. The cooling and heating conduction distance is shorter, which can speed up the temperature adjustment and reduce energy consumption. The overflow pipeline is close to the outer wall of the concrete test wall, which can better simulate the process of water seeping from the outer wall into the inner wall.

[0017] (4) Several of the vertical branch pipes are connected at equal intervals to the bottom of the horizontal main pipe, which can make the wall seepage more uniform. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of the large test chamber in this invention.

[0019] Figure 2 This is a water supply structure diagram of the water circulation pipeline and overflow pipeline in this invention.

[0020] Figure 3 This is a schematic diagram of the internal pipeline structure of the concrete test wall in this invention.

[0021] Figure 4 This is a schematic diagram of the overflow pipe structure in this invention.

[0022] In the diagram: 1. Large test chamber; 2. Small test chamber; 3. Cold water supply equipment; 4. Hot water supply equipment; 5. First air conditioner; 6. Second air conditioner; 7. Humidifier; 8. Concrete test wall; 9. Water circulation pipeline; 10. Overflow pipeline; 11. Circulation pump; 12. Booster pump; 13. Water storage tank; 14. Valve; 101. Water outlet hole; 102. Horizontal main pipe; 103. Vertical branch pipe. Detailed Implementation

[0023] The technical solution of the present invention will be further described in detail below through specific embodiments. Example 1

[0024] like Figure 1-4As shown, a simulated laboratory for preventing condensation on walls and waterproofing under back pressure includes a large test chamber 1, a small test chamber 2 located inside the large test chamber 1, and a cold water supply device 3 and a hot water supply device 4 located outside the large test chamber 1.

[0025] The large test chamber 1 is equipped with a first air conditioner 5 to regulate the temperature inside the large test chamber 1; the small test chamber 2 is equipped with a second air conditioner 6 (the outdoor unit of the air conditioner can be set outside the large test chamber 1) and a humidifier 7 to regulate the temperature and humidity inside the small test chamber 2. The humidifier 7 can be a humidifier with built-in humidity detection function, which can directly read the indoor humidity.

[0026] In this embodiment, the small test room 2 is enclosed by four concrete test walls 8. In other embodiments, more concrete test walls 8 can be used to form a polygonal structure. Different materials are used to coat the inner walls of different concrete test walls 8 for comparative testing. To facilitate personnel to enter and operate, a door can be set on one of the concrete test walls 8 of the small test room 2.

[0027] Each of the concrete test walls 8 is embedded with a water circulation pipe 9 and an overflow pipe 10. The water circulation pipe 9 can be an integrally formed serpentine pipe. The inlet and outlet ports of the water circulation pipe 9 are connected to the supply port of the cold water supply device 3 and the supply port of the hot water supply device 4 respectively via tee fittings. A circulation pump 11 is installed on the water circulation pipe 9. Valves 14 are installed on the supply ports of the cold water supply device 4 and the hot water supply device 5. By switching between cold water and hot water, the water circulation pipe 9 can cool or heat the concrete test wall 8. The cold water supply device 3 can be a tap water pipe, a cold water tank, etc., and the hot water supply device 4 can be hot water heated by a boiler, hot water heated by a gas water heater, etc.

[0028] The overflow pipe 10 has several small outlet holes 101 on its wall. Each concrete test wall 8 is equipped with a pressure-regulating water injection device, and the outlet of the pressure-regulating water injection device is connected to the inlet of the overflow pipe 10. The pressure-regulating water injection device includes a pressure pump 12 and a water storage tank 13. Multiple water storage tanks 13 can be connected in series with pipes, and then connected to the liquid supply port of the cold water supply equipment 3 through a single inlet to fill with water. The pressure pump 12 is installed at the outlet of the water storage tank 13 to pressurize the injected water and simulate the water seepage situation of the basement wall through the overflow pipe 10.

[0029] To ensure more even water seepage across the entire wall, the overflow pipe 10 includes a horizontal main pipe 102 and several vertical branch pipes 103. The inlet of the overflow pipe 10 is located in the center of the horizontal main pipe 102. The top ends of the several vertical branch pipes 103 are connected at equal intervals to the bottom of the horizontal main pipe 102. Several small outlet holes 101 are located on the pipe wall of each of the vertical branch pipes 103.

[0030] The water circulation pipe 9 is located close to the inner wall of the concrete test wall 8, which means it is closer to the coating material and the cooling and heating conduction distance is shorter, which can speed up the temperature adjustment and reduce energy consumption. The overflow pipe 10 is located close to the outer wall of the concrete test wall 8, which can better simulate the process of water seeping from the outer wall into the inner wall.

[0031] Working principle: First, the temperature inside the large test chamber 1 is set by the first air conditioner 5, the temperature inside the small test chamber 2 is set by the second air conditioner 6, and the humidity inside the small test chamber 2 is set by the humidifier 7. Then, the cold water supply equipment 3 is connected by the water circulation pipe 9. Through the circulation of cold water, the wall temperature of the concrete test wall 8 can be reduced, thereby simulating the environmental conditions of a basement with humid air and cold walls. Different coatings are applied to the inner wall of the small test chamber 2. By gradually adjusting the humidity inside the small test chamber 2, the anti-condensation performance of different coatings can be tested and compared.

[0032] Then, the pressurized water injection device can inject water into the concrete test wall 8 through the overflow pipe 10. By gradually increasing the water pressure, the environmental conditions of water seepage in the basement wall can be simulated, and the back pressure waterproofing performance of different back pressure waterproofing materials can be tested and compared.

[0033] Finally, the water circulation pipeline 9 connects the cold water supply device 3 and the hot water supply device 4, allowing for switching between cold and hot water. When the wall is cooled, an anti-condensation test can be conducted, and when the wall is heated, moisture evaporation can be accelerated. Especially when peeling off the backwater-resistant material and coating, by alternately switching between cold and hot water and intermittently replenishing water to the concrete test wall 8 by the pressurized water injection device, the wall can alternate between thermal expansion, contraction, dampness, and dryness. Due to the different physical properties of the wall and the material, the alternating changes in state will quickly reduce the adhesion between the two, making it easier to peel off the material. Example 2

[0034] A method for simulating wall condensation prevention and wall back pressure waterproofing, using the wall condensation prevention and wall back pressure waterproofing simulation laboratory described in Example 1, includes the following steps: Step 1: Applying materials: Apply different backwater and pressure-resistant materials to the inner walls of each concrete test wall 8, and then apply different coatings to the surface of each backwater and pressure-resistant material; Step 2: Simulate a damp basement environment: Turn on the first air conditioner 5 and set the temperature in the large test room 1 to cooling 16℃; turn on the second air conditioner 6 and set the temperature in the small test room 2 to heating 35℃; turn on the humidifier 7 and set the humidity in the small test room 2 to 50%; connect the water circulation pipe 9 to the cold water supply equipment 3 to keep the concrete test wall 8 at a low temperature. Step 3: Conduct a wall anti-condensation test: Gradually increase the humidity in the small test room 2, observe and record the condensation of the paint on each of the concrete test walls 8; Step 4: Simulate a basement water seepage environment: Each of the pressurized water injection devices injects water into each of the concrete test walls 8 through the overflow pipe 10, and the initial water injection pressure is set to 20 kPa. Step 5: Conduct a back pressure waterproofing test: Gradually increase the water injection pressure of each of the pressurized water injection devices, observe and record the water seepage pressure of the back water pressure-resistant material on each of the concrete test walls 8; Step 6: Remove the backwater and pressure-resistant material and paint applied to each of the concrete test walls 8 for use in the next test.

[0035] Step six includes the following sub-steps: Step S1: The water circulation pipe 9 is connected to the cold water supply equipment 3 to cool the wall. Step S2: The water circulation pipe 9 is connected to the hot water supply equipment 4 to heat the wall; Step S3: Repeat steps S1 and S2 multiple times. During this process, the pressurized water injection device is used to intermittently replenish water into the concrete test wall 8, causing the wall to alternate between thermal expansion, contraction, dampness, and dryness. Step S4: Remove the backwater and pressure-resistant material and paint applied to each of the concrete test walls 8, and connect the water circulation pipe 9 to the hot water supply equipment 4 to dry the wall.

[0036] Experiments showed that after this change lasted for 3-5 days, the backwater-proof material and coating could be easily peeled off. Otherwise, the backwater-proof material, in particular, was very difficult to peel off manually, and the process would be very laborious. This allowed the concrete test wall 8 to be repeatedly tested for condensation prevention and backwater-proofing.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A simulated laboratory for preventing condensation on walls and waterproofing under back pressure, characterized in that: The system includes a large test chamber, smaller test chambers located inside the large test chamber, and cold water and hot water supply equipment located outside the large test chamber. A first air conditioner is installed in the large test chamber, and a second air conditioner and a humidifier are installed in each of the smaller test chambers. Each smaller test chamber is enclosed by multiple concrete test walls, each wall containing a water circulation pipe and an overflow pipe. The inlet and outlet ports of the water circulation pipe are connected to the supply ports of the cold water and hot water supply equipment, respectively, via tee fittings. Several small outlet holes are formed on the wall of the overflow pipe. Each concrete test wall is equipped with a pressure-regulating water injection device, the outlet of which is connected to the inlet of the overflow pipe.

2. The simulated laboratory for preventing condensation on walls and waterproofing under back pressure as described in claim 1, characterized in that: The water circulation pipeline is located near the inner wall of the concrete test wall, and the overflow pipeline is located near the outer wall of the concrete test wall.

3. The wall anti-condensation and wall back pressure waterproofing simulation laboratory according to claim 2, characterized in that: The overflow pipeline includes a horizontal main pipe and several vertical branch pipes. The inlet of the overflow pipeline is located in the center of the horizontal main pipe. The top ends of the several vertical branch pipes are connected at equal intervals to the bottom of the horizontal main pipe. Several outlet holes are located on the pipe wall of each of the vertical branch pipes.

4. The wall anti-condensation and wall back pressure waterproofing simulation laboratory according to any one of claims 1-3, characterized in that: The pressurized water injection device includes a pressurized pump and a water storage tank. The inlet of the water storage tank is connected to the liquid supply port of the cold water supply equipment through a pipe, and the pressurized pump is installed at the outlet of the water storage tank.

5. The wall anti-condensation and wall back pressure waterproofing simulation laboratory according to claim 4, characterized in that: A circulation pump is installed on the water circulation pipeline, and valves are installed on the liquid supply ports of the cold water supply equipment and the hot water supply equipment.

6. A method for simulating wall condensation prevention and wall back pressure waterproofing, characterized in that, The test was conducted using the simulated laboratory for wall anti-condensation and wall back pressure waterproofing as described in any one of claims 1-5, including the following steps: Step 1: Applying materials: Apply different backwater and pressure-resistant materials to the inner walls of each concrete test wall, and then apply different coatings to the surface of each backwater and pressure-resistant material; Step 2: Simulate a damp basement environment: Turn on the first air conditioner and set the temperature in the large test chamber to t1; turn on the second air conditioner and set the temperature in the small test chamber to t2; turn on the humidifier and set the humidity in the small test chamber to s; connect the water circulation pipeline to the cold water supply equipment to keep the concrete test wall at a low temperature. Step 3: Conduct a wall anti-condensation test: Gradually increase the humidity s in the small test chamber, observe and record the condensation of the paint on each concrete test wall; Step 4: Simulate a basement water seepage environment: Each of the pressurized water injection devices injects water into each of the concrete test walls through the overflow pipe, and the initial water injection pressure is set to p. Step 5: Conduct a back pressure waterproofing test: Gradually increase the water injection pressure p of each of the pressurized water injection devices, observe and record the water seepage pressure of the back water pressure-resistant material on each of the concrete test walls; Step 6: Remove the water-resistant and pressure-resistant material and paint applied to each of the concrete test walls for use in the next test.

7. The method for simulating wall condensation prevention and wall back pressure waterproofing according to claim 6, characterized in that, Step six includes the following sub-steps: Step S1: The water circulation pipeline is connected to the cold water supply equipment to cool the wall. Step S2: The water circulation pipeline is connected to the hot water supply equipment to heat the wall; Step S3: Repeat steps S1 and S2 multiple times. During this process, the pressurized water injection device is used to intermittently replenish water into the concrete test wall, causing the wall to alternate between thermal expansion, contraction, dampness, and dryness. Step S4: Remove the backwater and pressure-resistant material and paint applied to each of the concrete test walls, connect the water circulation pipeline to the hot water supply equipment, and dry the wall.

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